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arXiv · 2209.02664

Spin-phonon interaction and short range order in $\mathrm{Mn_3Si_{2}Te_6}$

Sanja Djurdjić Mijin·Andrijana Šolajić·Jelena Pešić·Yu Liu·Cedomir Petrovic·Michel Bockstedte·Alberta Bonanni·Zoran V. Popović·Nenad Lazarević
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Abstract

The vibrational properties of ferrimagnetic $\mathrm{Mn_3Si_{2}Te_6}$ single crystals are investigated using Raman spectroscopy and density functional theory calculations. Eighteen Raman-active modes are identified, fourteen of which are assigned according to with the trigonal symmetry. Four additional peaks, obeying the $A_{1g}$ selection rules, are attributed to the overtones. The unconventional temperature evolution of the $A_{1g}^5$ mode self-energy suggests a competition between different short-range magnetic correlations that significantly impact the spin-phonon interaction in $\mathrm{Mn_3Si_{2}Te_6}$. The research provides a comprehensive insight to the lattice properties, studies their temperature dependence and shows the arguments for existence of competing short-range magnetic phases in $\mathrm{Mn_3Si_{2}Te_6}$.

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Sanja Djurdjić Mijin, Andrijana Šolajić, Jelena Pešić, Yu Liu, Cedomir Petrovic, Michel Bockstedte, Alberta Bonanni, Zoran V. Popović, Nenad Lazarević. 2022-09-06. Spin-phonon interaction and short range order in $\mathrm{Mn_3Si_{2}Te_6}$. https://doi.org/10.1103/physrevb.107.054309

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